Ecu Codes
Ecu Codes
Ecu Codes
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Diagnostic Trouble Code (DTC) Quick Reference List—Engine Control Unit (ECU)
The diagnostic trouble code number is indicated by an (SPN) Suspect Parameter Number and a (FMI) Failure Mode
Indicator number. (91.09) 91 is the SPN number and 09 is the FMI number.
SERVICE ADVISOR™ system. See Reading Diagnostic Trouble Codes with Service ADVISOR™ Diagnostic
Application. (Group 9015-20.)
CAN Monitor Unit (CMU). See CAN Monitor Unit (CMU) Menu Structure—Service Mode. (Group 9015-20.)
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For in-depth diagnostics on all ECU diagnostic trouble codes, see Trouble Code Diagnostics and
Tests in CTM385.
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